A multi-piece solid golf ball comprises a solid core and a cover of two
inner and outer layers surrounding the core. The outer cover layer has a
surface formed with a plurality of dimples is characterized in that a
product of the Shore D hardnesses of the inner cover layer multiplied by
the Shore D hardnesses of the outer cover layer and a proportion V.sub.R
(%) of the total of the volumes of dimple spaces each defined below a
plane circumscribed by the dimple edge to the overall volume of a phantom
sphere given on the assumption that the golf ball surface is free of
dimples satisfy any one of the following combinations (1) to (5):
(1) 1,500 to less than 2,000
V.sub.R : 0.8 .to 1.1%
(2) 2,000 to less than 2,500
V.sub.R : 0.75 to 1.05%
(3) 2,500 to less than 3,000
V.sub.R : 0.7 to 1%
(4) 3,000 to less than 3,500
V.sub.R : 0.65 to 0.95%
(5) 3,500 to 4,000
V.sub.R : 0.6 to 0.9%. The dimples include at least three types of dimples
which are different in at least one of a diameter, a depth, and a value
V.sub.0 which is the volume of one dimple space defined below a plane
circumscribed by the dimple edge divided by the volume of a cylinder whose
bottom is the plane and whose height is the maximum depth of the dimple
from the bottom.
